.sc {
    position: fixed;
    overflow: hidden;
    height: 100%;
    top: 0px;
    width: 100%;
    z-index: -1;
}

.sc-bg {
    background: linear-gradient(
            #000000,
            #1e1e1e,
            #09080e,
            #3e3e56,
            #50558c,
            #f05398,
            #f39a92,
            #8fdefd,
            #a0e1fd,
            #e4f7fd,
            #f1ffff,
            #e8faff,
            #e5f8fe,
            #c3ecfe,
            #a1e2fe,
            #90dffe,
            #40aad8,
            #72cdd7,
            #ebd39a,
            #ec9b15,
            #e33e0c,
            #360008,
            #292929,
            #1e1e1e,
            #000000
    ); /* 标准的语法 */
    height: 8640px;
}